Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos torneios individuais Ludovic Walter venceu?
 ###Tabelas: CREATE TABLE "giovani_new_generation"_section ("giovani_new_generation"_section_id AUTO_INCREMENT PRIMARY KEY, Position VARCHAR, Singer VARCHAR, 2nd Evening VARCHAR, 3rd Evening VARCHAR, 4th Evening VARCHAR, 5th Evening VARCHAR) CREATE TABLE all_the_triple_crowns_achieved (all_the_triple_crowns_achieved_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Club VARCHAR, National League VARCHAR, National Cup VARCHAR, European Cup VARCHAR) CREATE TABLE events (events_id AUTO_INCREMENT PRIMARY KEY, Tournament VARCHAR, Date VARCHAR, City VARCHAR, Country VARCHAR, Surface VARCHAR, Singles champions VARCHAR, Doubles champions VARCHAR) CREATE TABLE metropolitan_areas (metropolitan_areas_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Metropolitan area VARCHAR, Principal city VARCHAR, 10,000+ places INT, Densest incorporated place VARCHAR, Density VARCHAR) CREATE TABLE first_class_bowling_statistics (first_class_bowling_statistics_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Matches INT, Overs VARCHAR, Maidens INT, Runs INT, Wickets INT, Average VARCHAR, Economy VARCHAR, 5w INT, 10w INT, Best Bowling VARCHAR)  
SELECT COUNT Tournament FROM events WHERE Singles champions = Ludovic Walter